PCE84C487 datasheet(3/36 Pages) PHILIPS

3 / 36 page

1996 Feb 21

Philips Semiconductors

Objective speciﬁcation

Microcontrollers for digital auto-sync and

VST TV controller applications

PCE84C486; PCE84C487

FEATURES

1.1

General

• CMOS 8-bit CPU (enhanced 8048 CPU) with 4 kbytes

system ROM and 128 bytes system RAM

• One 8-bit timer/event counter (T1) and one 8-bit counter

(T3) triggered by external input

• Three single level vectored interrupt sources: external

(INTN), counter/timer and I2C-bus

• 2 directly testable inputs T0 and T1

• On-chip oscillator clock frequency: 1 to 10 MHz

• On-chip Power-on-reset with low power detector

• The PCE84C486 has eleven quasi-bidirectional I/O

lines, the PCE84C487 has twelve. The configuration of

each I/O line individually selected by mask option

• Idle and Stop modes for reduced power consumption

• Operating temperature: −25 to +85 °C

• Operating voltage: 4.5 to 5.5 V

• Packages: SDIP32 for the PCE84C486; SDIP42 for the

PCE84C487.

1.2

Special

• Master-slave I2C-bus interface

• Four 6-bit Pulse Width Modulated outputs

• Four 7-bit Pulse Width Modulated outputs

• Four 8-bit Pulse Width Modulated outputs (PCE84C487

only)

• One 14-bit Pulse Width Modulated output

• Two 4-bit Analog-to-Digital Converter (ADC) channels

• 14 derivative I/O ports

• Watchdog Timer.

GENERAL DESCRIPTION

The PCE84C486 and PCE84C487 are low-cost

microcontrollers and have been designed for use with

auto-sync monitors, handling mode detection, digital

control and Voltage Synthesized Tuning (VST). These

microcontrollers have no on-chip OSD function.

The term PCE84C48X is used throughout this data sheet

to refer to both devices. Differences between the

PCE84C486 and the PCE84C487 are highlighted

throughout the document.

The PCE84C48X is a member of the 84CXXX CMOS

microcontroller family. The device uses the PCE84CXX

processor core and has 4 kbytes of ROM and 128 bytes of

RAM. I/O requirements are catered for with 11 general

purpose bidirectional I/O lines (the PCE84C487 has 12)

plus 12 function combined I/O lines (the PCE84C487 has

16). Nine PWM analog outputs (the PCE84C487 has 13)

are available for analog control purposes and also a two

channel 4-bit ADC. The device has an 8-bit counter (T3),

for use in pulse counting applications and also an 8-bit

timer/counter (T1) with programmable clock. A Watchdog

timer, a master-slave I2C-bus interface and 2 directly

testable lines are also available on-chip.

The block diagram of the PCE84C486 is shown in Fig.1;

the block diagram of the PCE84C487 is shown in Fig.2.

ORDERING INFORMATION

TYPE NUMBER

PACKAGE

NAME

DESCRIPTION

VERSION

PCE84C486

SDIP32

plastic shrink dual in-line package; 32 leads (400 mil)

SOT232-1

PCE84C487

SDIP42

plastic shrink dual in-line package; 42 leads (600 mil)

SOT270-1

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